/**
 * Copyright (c) 2005-2012 by Appcelerator, Inc. All Rights Reserved.
 * Licensed under the terms of the Eclipse Public License (EPL).
 * Please see the license.txt included with this distribution for details.
 * Any modifications to this file must keep this entire header intact.
 */
/*
 * Created on Apr 8, 2006
 */
package org.python.pydev.ui.refactoring;

import org.eclipse.core.resources.IFile;
import org.eclipse.core.runtime.Assert;
import org.eclipse.jface.dialogs.Dialog;
import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.ltk.core.refactoring.Refactoring;
import org.eclipse.ltk.core.refactoring.RefactoringStatus;
import org.eclipse.ltk.ui.refactoring.RefactoringWizard;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Text;
import org.python.pydev.ast.refactoring.IPyRefactoringRequest;
import org.python.pydev.ast.refactoring.MultiModuleMoveRefactoringRequest;
import org.python.pydev.core.docutils.PyStringUtils;
import org.python.pydev.plugin.PyDevUiPrefs;
import org.python.pydev.shared_core.string.StringUtils;

public class PyRenameRefactoringWizard extends RefactoringWizard {

    private static final String UPDATE_REFERENCES = "UPDATE_REFERENCES";
    private static final String SIMPLE_RESOURCE_RENAME = "SIMPLE_RESOURCE_RENAME";
    private final String fInputPageDescription;
    private IPyRefactoringRequest fRequest;
    private TextInputWizardPage inputPage;
    private String fInitialSetting;

    public PyRenameRefactoringWizard(Refactoring refactoring, String defaultPageTitle, String inputPageDescription,
            IPyRefactoringRequest request) {
        super(refactoring, DIALOG_BASED_USER_INTERFACE);
        setDefaultPageTitle(defaultPageTitle);
        fInputPageDescription = inputPageDescription;
        this.fRequest = request;
        this.fInitialSetting = request.getInitialName();
        Assert.isNotNull(this.fInitialSetting);
    }

    /* non java-doc
     * @see RefactoringWizard#addUserInputPages
     */
    @Override
    protected void addUserInputPages() {
        inputPage = createInputPage(fInputPageDescription, fInitialSetting);
        addPage(inputPage);
    }

    protected TextInputWizardPage createInputPage(String message, final String initialSetting) {
        return new TextInputWizardPage(message, true, initialSetting) {
            private Text textField;
            private IFile targetFile;

            @Override
            protected RefactoringStatus validateTextField(String text) {
                RefactoringStatus status = new RefactoringStatus();
                boolean acceptPoint = fRequest.isModuleRenameRefactoringRequest();
                if (PyStringUtils.isValidIdentifier(text, acceptPoint)) {
                    fRequest.setInputName(text);
                } else {
                    status.addFatalError("The name: " + text + " is not a valid identifier.");
                }
                return status;
            }

            @Override
            protected Text createTextInputField(Composite parent, int style) {
                Text ret = super.createTextInputField(parent, style);
                this.textField = ret;
                setTextToFullName();
                return ret;
            }

            private void setTextToResourceName() {
                if (targetFile != null) {
                    String curr = targetFile.getName();
                    textField.setText(curr);
                    int i = curr.lastIndexOf('.');

                    if (i >= 0) {
                        textField.setSelection(0, i);
                    } else {
                        textField.selectAll();
                    }
                }
            }

            private void setTextToFullName() {
                textField.setText(initialSetting);

                String text = initialSetting;
                int i = text.lastIndexOf('.');
                if (i >= 0) {
                    textField.setSelection(i + 1, text.length());
                } else {
                    textField.selectAll();
                }
            }

            @Override
            protected void textModified(String text) {
                if (targetFile != null && fRequest.getSimpleResourceRename()) {
                    if (!isEmptyInputValid() && text.equals("")) { //$NON-NLS-1$
                        setPageComplete(false);
                        setErrorMessage(null);
                        restoreMessage();
                        return;
                    }
                    if ((!isInitialInputValid()) && text.equals(targetFile.getName())) {
                        setPageComplete(false);
                        setErrorMessage(null);
                        restoreMessage();
                        return;
                    }

                    setPageComplete(validateTextField(text));
                }
                if (fRequest instanceof MultiModuleMoveRefactoringRequest) {
                    RefactoringStatus status;
                    if (text.length() == 0) {
                        //Accept empty for move!
                        status = new RefactoringStatus();
                        status.addInfo("Empty text: move to source folder");
                    } else {
                        status = validateTextField(text);
                    }

                    if (!status.hasFatalError()) {
                        fRequest.setInputName(text);
                    }
                    setPageComplete(status);
                } else {
                    super.textModified(text);
                }
            }

            @Override
            public void createControl(Composite parent) {
                Composite superComposite = new Composite(parent, SWT.NONE);
                setControl(superComposite);
                initializeDialogUnits(superComposite);

                superComposite.setLayout(new GridLayout());
                Composite composite = new Composite(superComposite, SWT.NONE);
                composite.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

                GridLayout layout = new GridLayout();
                layout.numColumns = 4;
                layout.verticalSpacing = 8;
                composite.setLayout(layout);

                Label label = new Label(composite, SWT.NONE);
                label.setText("New &value:");

                final Text text = createTextInputField(composite);
                GridData gd = new GridData(GridData.FILL_HORIZONTAL);
                gd.widthHint = convertWidthInCharsToPixels(25);
                gd.horizontalSpan = 3;
                text.setLayoutData(gd);

                // layouter.perform(label, text, 1);
                //
                if (fRequest.isModuleRenameRefactoringRequest()) {
                    Button updateReferencesButton = addOptionalUpdateReferencesCheckbox(composite);
                    IFile targetFile = fRequest.getIFileResource();
                    if (targetFile != null) {
                        this.targetFile = targetFile;
                        addResourceRenameCheckbox(composite, updateReferencesButton);
                    }
                }

                //spacer
                new Label(composite, SWT.NONE);

                Button bt = new Button(composite, SWT.PUSH);
                bt.setText("as_&lower_underscore");
                bt.addSelectionListener(new SelectionAdapter() {
                    @Override
                    public void widgetSelected(SelectionEvent e) {
                        text.setText(StringUtils.asStyleLowercaseUnderscores(text.getText()));
                    }
                });

                Button bt2 = new Button(composite, SWT.PUSH);
                bt2.setText("CamelCaseFirst&Upper");
                bt2.addSelectionListener(new SelectionAdapter() {
                    @Override
                    public void widgetSelected(SelectionEvent e) {
                        text.setText(StringUtils.asStyleCamelCaseFirstUpper(text.getText()));
                    }
                });

                Button bt3 = new Button(composite, SWT.PUSH);
                bt3.addSelectionListener(new SelectionAdapter() {
                    @Override
                    public void widgetSelected(SelectionEvent e) {
                        text.setText(StringUtils.asStyleCamelCaseFirstLower(text.getText()));
                    }
                });
                bt3.setText("&camelCaseFirstLower");

                // addOptionalUpdateTextualMatches(composite, layouter);
                // addOptionalUpdateQualifiedNameComponent(composite, layouter, layout.marginWidth);

                Dialog.applyDialogFont(superComposite);
            }

            protected Button addResourceRenameCheckbox(Composite result, final Button updateReferencesButton) {
                final Button resourceRename = new Button(result, SWT.CHECK);
                resourceRename.setText("&Simple Resource Rename / Change Extension?");

                IPreferenceStore preferences = PyDevUiPrefs.getPreferenceStore();
                preferences.setDefault(SIMPLE_RESOURCE_RENAME, false); //Default is always false to rename resources.
                boolean simpleResourceRenameBool = preferences.getBoolean(SIMPLE_RESOURCE_RENAME);
                resourceRename.setSelection(simpleResourceRenameBool);
                fRequest.setSimpleResourceRename(simpleResourceRenameBool);
                resourceRename.addSelectionListener(new SelectionAdapter() {
                    @Override
                    public void widgetSelected(SelectionEvent e) {
                        IPreferenceStore preferences = PyDevUiPrefs.getPreferenceStore();
                        boolean simpleResourceRenameBool = resourceRename.getSelection();
                        updateReferencesButton.setVisible(!simpleResourceRenameBool);
                        preferences.setValue(SIMPLE_RESOURCE_RENAME, simpleResourceRenameBool);
                        fRequest.setSimpleResourceRename(simpleResourceRenameBool);

                        // Must be the last thing.
                        if (simpleResourceRenameBool) {
                            setTextToResourceName();
                        } else {
                            setTextToFullName();
                        }
                    }

                });
                GridData gridData = new GridData(GridData.FILL_HORIZONTAL);
                gridData.horizontalSpan = 3;
                resourceRename.setLayoutData(gridData);
                updateReferencesButton.setVisible(!simpleResourceRenameBool);
                if (simpleResourceRenameBool) {
                    setTextToResourceName();
                }
                return resourceRename;
            }

            protected Button addOptionalUpdateReferencesCheckbox(Composite result) {
                final Button updateReferences = new Button(result, SWT.CHECK);
                updateReferences.setText("&Update References?");

                IPreferenceStore preferences = PyDevUiPrefs.getPreferenceStore();
                preferences.setDefault(UPDATE_REFERENCES, true); //Default is always true to update references.
                boolean updateRefs = preferences.getBoolean(UPDATE_REFERENCES);
                updateReferences.setSelection(updateRefs);
                fRequest.setUpdateReferences(updateRefs);
                updateReferences.addSelectionListener(new SelectionAdapter() {
                    @Override
                    public void widgetSelected(SelectionEvent e) {
                        IPreferenceStore preferences = PyDevUiPrefs.getPreferenceStore();
                        boolean updateRefs = updateReferences.getSelection();
                        preferences.setValue(UPDATE_REFERENCES, updateRefs);
                        fRequest.setUpdateReferences(updateRefs);
                    }

                });
                GridData gridData = new GridData(GridData.FILL_HORIZONTAL);
                gridData.horizontalSpan = 3;
                updateReferences.setLayoutData(gridData);
                return updateReferences;

            }
        };

    }

}
